Solar Panels Got Cheap. The Grid Did Not.

Solar modules now sell for about 12 cents per watt, according to energy researcher Dave Jones, down from $5 to $6 per watt 26 years ago. Reporting attributes that collapse largely to enormous Chinese production. The results are visible across very different markets: rural households can replace kerosene lamps, China has installed clean generation faster than its grid can always use it, solar surpassed coal in US electricity production in June, and abundant daytime power has disrupted Spain’s energy market.

That 12-cent figure describes a module benchmark, not a finished power supply delivered to a wall socket. At that rate, the panels for an illustrative five-kilowatt array amount to about $600 before retail markups. The buyer still needs mounting hardware, wiring, an inverter, skilled labor, permits, inspection, financing, and often a battery. A utility project adds land, substations, transmission, engineering, and a place in the interconnection queue.

The inexpensive part is the visible part

Cheap modules can lower the final bill, and in places replacing kerosene or diesel they can transform daily life without waiting for a vast centralized network. But the benefit reaches customers unevenly. A developer buying containers directly has different purchasing power from a household hiring a local installer. Tariffs and trade barriers can separate the global factory price from the local quote, while interest rates can make a low equipment price expensive over the life of a loan.

The grid changes the arithmetic again. Solar produces when the sun permits, not when demand sends an invoice. If transmission is full or local supply exceeds use, operators may curtail output and wholesale prices may collapse without producing an equally dramatic reduction in household bills. Storage can move some electricity past sunset, but batteries add capital cost, controls, warranty terms, degradation, and eventual replacement.

Buyers should also ask which guarantee covers which object. A long module warranty does not necessarily cover the inverter, battery, roof work, labor, lost production, or the installer’s survival as a business. Low panel prices make replacement hardware less frightening; they do not make removal, shipping, installation, and downtime free. The panel has become ordinary merchandise. Access remains the premium product.

Every solar bargain should therefore arrive with four numbers and a date: the all-in installed cost, the promised connection date, expected annual output after curtailment and local weather, and the storage needed to serve demand after sunset. Without that ledger, 12 cents per watt is an impressive manufacturing achievement being asked to impersonate an electricity bill.